國內由於三年嚴防死守，感染率低，所以沒有免疫力，疫苗的效果可能也差，所以這次一下子就爆發了

來源: laopika 於 2022-12-17 12:01:52 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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